Calendar



A. LATIER.

CALENDAR.

APPLICATION FILED OCT- 31, 1919.

1,339,401, Patented May 11,1920.

ALEXANDER LATIER, OF JERSEY CITY, NEW JERSEY.

CALENDAR.

Application filed October 31, 1919. Serial No. 334,696.

To all whom it may concern:

Be it' known that I, ALEXANDER LATIER, a citizen of the United States, residing at Jersey City, in the county of Hudson and State. of New Jersey, have invented certain new and useful Improvements in Calendars, of which the following is a specification.

This. invention relates to what is sometimes. called a perpetual calendar, that is, a calendar that is arranged to cover a good many years. It has for its object a simple arrangement of disks whereby one may ascertain what day of the week any day in years past or in years to come falls. Or the calendar can have the disks so arranged and fixed together that it may be used as a current calendar. The calendar also makes provision for leap years. other features will appear from the description following.

In the drawings,

Figure 1 is a view of the assembled calendar showing it set for January, 1919.

Fig. 2 is a cross section on the line 2-2 of Fig. 1.

Fig. 3 is a view of the same parts shown in Fig. 1 with the disk designated 0 in Fig. 1 and the disk shown in Fig. 4 removed.

Fig. 4. is. a view of the year and day of the week disk.

Fig. 5 is a view of the month disk.

at designates the day of the month ring, comprising an upper and lower ply (see Fig. 2) separated by a narrow intermediate ply. b which affords an interiorly-tacing groove. In this groove is rotatably secured the month disk shown in Fig. 5 and designated e. The composite day of the month ring a is divided off into thirty-five segmental divisions, thirty-one of which are numbered beginning with the numeral 1 which is placed on a web f that intervenes between two apertures that allows the exposure of the designations on the month disk 6 as shown in Fig. 5. One of these apertures is for use when a year of 365 days is under consideration and the otheraperture which has an L to the left of it is for use in leap years.

Referring to Fig. 4, the day of the week and year disk 41 is shown. This is superimposed upon the month disk 6 n the central opening of the upper ply'of the composite ring. The year-selecting disk 0 is simply a disk with a notch in it to expose the enumeration of one year of the day of Specification of Letters Patent.

These and- Patented May 11, 1920.

the week and year disk 03. All these disks are pinned or riveted together by the member g at the center.

The operation is as follows: S'u posing one desires to use the calendar for anuary,

1919he turns the year-selecting disk 0' around; until the notch exposes 1919-, as shown m Fig. 1. The month disk c'isiturnedf to expose the two J anuaries atthe'itwoaper tures 1n the composite ring a. Then the" in h is inserted through the yearselecting (115k: year disk at and the disk 6.. This connects all these 0, the day of the week and the disks together so that they can be turned together. V hen the year and the day of the week disk is made up, care is taken that in each one of the segmental divisions a particular year appears on which the'first' of January of that year starts. This, of course, is ascertained by com utation or otherwise by the designer. e days of the week are in order clockwise around the disk. The years are not in order but are arranged with a view, as explained, of getting the year in. the same segmental division with the day of the week on which that year starts. The letters L and 0 respectively, found in all the divisions, denote whether the year is a regular year or a leap year. There are'thirty-five segmental divisions on this disk (Z corresponding with the thirtyfive segmental divisions on the composite ring a (the day of the month ring).

As already explained, 1919 having been placed upon the day of the week that starts 1919, obviously when 1919 on this day of the week and year disk has been lined up with January on the month disk and the day of the week, year and month all register with the apertures and the first day of the month, there is presented simply an ordinary calendar for the month of Janu ary with its thirty one' days, except that in stead of the calendar being in several rows it is in one circular row. When January is past and the month of February occurs, the tied together disks are rotated until: the two Februaries turn up in the apertures in the composite disk a.

Referring to Fig. 5, where the month disk 6 is shown, it will' be seen that February is spaced in the third segmental divi sion from January. The reason for thatv is there are thirtyone days in January and-the days of the week have to be turnedback for the three days that January has run into ment. This is obviously due to the fact that in this year February has run into the fifth week one day and it is necessary to turn the month disk back one day to bring it into step again, and so all along the leap year designations until the first of January is reached again. It will be seen that May is advanced two segments over April. That is because April has run into the fifth week two days and it is necessary to turn back two days to bring the month disk into step.

Preferably I print on the month disk under the designation of the month the number of days, as January, 31, etc. A circle of perforations 2' is provided in each of disks a, d and e to receive the pin it.

What I claim is:

1. A perpetual calendar, having in combination, a member having a plurality of divisions with thirty-one day of the month designations, a month member having divisions with the months of the year thereupon, one month advanced over the preceding month a number of divisions equal to the number of days that the preceding month overruns four weeks, and a day of the week and year member divided into a plurality of divisions in which in succession are placed the days of the week up to at least thirty-one and the years are placed in divisions represented by the day of the week on which that year begins, said members being connected together to operate in the manner described.

2. A perpetual calendar, having a member divided off into a plurality of divisions in which are thirty-one designations of the days of the month, a member usable in connection therewith containing a plurality of divisions designated with the months of the year and in which each month is advanced I over the preceding month a number of divisions equal to the number of days the preceding month overruns four weeks, the said member further provided with a separate row of designations for leap year in which the months following February are advanced one day over what they are in the preceding mentioned row of a regular year, and a member provided with a plurality of divisions of at least thirty-one in which are designated the days of the week in succession and in which are also contained designations of years starting on the day (if the week appearing in that division, said members he described.

A perpetual calendar, having in comblnation, a ring comprising at least thirtyone segments designated with the days of the month, a disk operable in connection with the ring and provided with segments in which are placed the months, each month being advanced over the preceding month the number of segments that the preceding month has days in excess of twenty-eight, and a day and year disk containing at least thirty-one segments on which are designated in succession the days of the week and years beginning on corresponding days of the week, said disks being arranged together to operate in the way described. 7

4. A perpetual calendar, having in combination, a ring provided with a plurality of segmental divisions to the extent of at'least thirty-one which are provided with the designations of the days of the month, a month disk rotatable within the said ring and comprising two roWs of designations, one for the months of a regular year and one for the months of a leap year, the said month designations or" the regular year row beingad vanced a number of segmental divisions equal to the number that the preceding month overruns twenty-eight days and the month designations in the leap year row being similarly advanced together with one additional advance following the month of February, and a day of the week and year disk rotatable in the said ring and comprising a plurality of such segmental divisions designated in succession by the days of. the week for at least thirty-one days and each division containing the designation of a year that begins on the day of the week of that division.

5. A perpetual calendar, comprising an outer ring divided into a'plurality of segmental divisions to the number of at least thirty-one and designated in succession by the days of the month, one or more apertures being provided in connection with the first day of the month division, a month disk rotating within said ring and provided with divisions of a similar nature in turn .provided with the designations of the month, the months being advanced in accordance with the number of days the preceding month excee'ds twenty-eight, and a day of the week and year disk rotatable in the center of the ring and provided with similar segmental divisions designated with the days of the week in succession for at least thirtysegmental divisions of at least thirty-one in number designated with the days of the month, a disk rotatable in the ring and having designations of the months upon corresponding segmental divisions, the said designations of the months being advanced over each other the number of days the preceding month overruns twenty-eight, a day of the week and year disk rotatable in the ring provided with correspondin segmental divisions designated with the ays of the week in succession for at least thirty-one and each division of this disk being designated with a year commencing on the day of the Week indicated in that division, and a year selecting disk provided with a notch which may be arranged over the year under consideration to exclude the other years from observation, the said disks being arranged to operate together in the manner described.

In testimony whereof I affix my signature. 20

ALEXANDER LATIER. 

